Measurement of Available Phosphorus and Potassium Contents in Soil using Visible-near-infrared Spectroscopy in Conjunction with SPA-LS-SVM Methods
2016 ◽
Vol 10
(12)
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pp. 934-941
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2013 ◽
Vol 44
(7)
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pp. 1156-1166
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1997 ◽
Vol 103
(1)
◽
pp. 204
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2015 ◽